EP0097800B1 - Wellendichtung mit aktiv-magnetisch geregeltem Dichtspalt - Google Patents

Wellendichtung mit aktiv-magnetisch geregeltem Dichtspalt Download PDF

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Publication number
EP0097800B1
EP0097800B1 EP83104616A EP83104616A EP0097800B1 EP 0097800 B1 EP0097800 B1 EP 0097800B1 EP 83104616 A EP83104616 A EP 83104616A EP 83104616 A EP83104616 A EP 83104616A EP 0097800 B1 EP0097800 B1 EP 0097800B1
Authority
EP
European Patent Office
Prior art keywords
sealing ring
seal
rotating
rotating sealing
shaft seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83104616A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0097800A3 (en
EP0097800A2 (de
Inventor
Rolf Albers
Emil Aschenbruck
Günter Neuhaus
Joachim Dr.-Ing. Kotzur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19823223744 external-priority patent/DE3223744C1/de
Application filed by MAN Gutehoffnungshutte GmbH filed Critical MAN Gutehoffnungshutte GmbH
Publication of EP0097800A2 publication Critical patent/EP0097800A2/de
Publication of EP0097800A3 publication Critical patent/EP0097800A3/de
Application granted granted Critical
Publication of EP0097800B1 publication Critical patent/EP0097800B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3444—Pressing means by magnetic attraction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
    • F16J15/3412—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities
    • F16J15/342—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities with means for feeding fluid directly to the face

Definitions

  • the invention relates to a shaft seal with a radial, flat sealing gap, which is formed by a sealing ring encircling the shaft and a non-encircling sealing ring fastened to the seal housing via an axially flexible and at the same time sealing element, the sealing medium being provided by feed bores and associated distribution pockets in the non-encircling sealing ring and / or flows on the outer or inner circumference of the circumferential sealing ring into the sealing gap, and sensors for measuring the sealing gap are arranged in the non-circumferential sealing ring on the sealing gap side, with which electromagnets arranged in the sealing housing are electronically controlled so that they interact with magnetizable counterparts on keep a certain sealing gap constant on each face of the rotating sealing ring.
  • a seal of this type is known from DE-C-3 221 380. This shaft seal enables a tight sealing gap to be maintained at all speeds and regardless of the pressure of the sealing medium, which minimizes leakage rates.
  • the sealing gap is preferably between an end face of the circumferential sealing ring and the associated non-circumferential sealing ring, the sealing gap being kept constant by electronically controlled electromagnets.
  • a sealing gap can also be arranged on each end face of the circumferential sealing ring if two different sealing media are used for the shaft seal or if the sealing medium is graded in pressure. This double seal consists of two complete sealing systems, which take up a lot of space and which require a lot of effort in terms of electronic control.
  • the object of the invention is therefore to further develop the shaft seal so that the dimensions of the shaft seal are reduced and the control effort is reduced while maintaining a constantly regulated sealing gap on each end face of the circumferential sealing ring and the possibility of using different sealing media.
  • the advantage that can be achieved thereby is that the non-rotating sealing ring can be controlled by only one electronically controlled magnet system. Compared to the double seal according to the main patent, this saves space and effort for a complete control system.
  • the non-rotating sealing ring can consist of two end rings receiving the sensors and a peripheral ring rigidly connecting the end rings.
  • the non-rotating sealing ring is normally held in its radial position with the means mentioned in DE-C-3 221 380.
  • a fixed radial guide can be useful.
  • the non-rotating sealing ring can be mounted so as to be axially movable radially in a guide bush arranged in the sealing housing, the surfaces in contact with one another having a very high surface quality.
  • the guide bushing can be provided on the inner circumference with ring channels into which bores open.
  • either a hole can be used for the joint supply of the sealing medium for both sealing gaps, or separate holes for each sealing gap when different sealing media are used.
  • One of the holes can be used to drain the sealant. Due to the smooth surfaces of the guide bush and the non-rotating sealing ring, there is practically no loss of sealing medium at this point.
  • the electromagnets located in the seal housing and the resilient and sealing element can be arranged on opposite end faces of the non-rotating sealing ring.
  • the resilient and sealing element between the housing and the non-rotating sealing ring seals the process space of the machine against the shaft seal. Therefore, the electromagnets, which are distributed on the opposite side over the circumference of the non-rotating sealing ring and are arranged in the sealing housing, are not exposed to the medium in the process chamber. This is particularly advantageous if the process medium is aggressive.
  • the non-rotating sealing ring is regulated by the electromagnets, which receive the electronically transmitted pulse of the distance-measuring sensors arranged in both end rings, in such a way that the gap width is always the same on both sides, i. H. the circumferential sealing ring rotates symmetrically in the non-circumferential sealing ring surrounding it.
  • the sealing ring 2 rotating with the shaft is enclosed by the non-circumferential sealing ring 20 on both end faces and on the circumferential side.
  • the clear dimension between the two end rings 20a and 20b is larger than the width of the circumferential sealing ring 2 by the gap dimension 1, 1a a predetermined on both sides.
  • the end rings are rigidly connected to one another by the peripheral ring 20c.
  • the guide bushing 21 is arranged in the seal housing 4.
  • the supply and discharge of the sealing medium are used on the inner circumference of the ring channels 22 into which holes 23 open.
  • the distance-measuring sensors 8 are embedded in the end rings 20a and 20b of the non-rotating sealing ring 20, the pulses of which are transmitted electronically to the electromagnets 9, which keep the gap widths 1 and 1a constant.
  • the electromagnets 9 are arranged in the seal housing on the end face of the non-rotating sealing ring 20 opposite the flexible and sealing element 3 and are thus separated from the process chamber VR.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Sealing Devices (AREA)
EP83104616A 1982-06-25 1983-05-11 Wellendichtung mit aktiv-magnetisch geregeltem Dichtspalt Expired EP0097800B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823223744 DE3223744C1 (de) 1982-06-05 1982-06-25 Wellendichtung mit aktiv-magnetisch geregeltem Dichtspalt
DE3223744 1982-06-25

Publications (3)

Publication Number Publication Date
EP0097800A2 EP0097800A2 (de) 1984-01-11
EP0097800A3 EP0097800A3 (en) 1987-09-30
EP0097800B1 true EP0097800B1 (de) 1989-03-08

Family

ID=6166835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104616A Expired EP0097800B1 (de) 1982-06-25 1983-05-11 Wellendichtung mit aktiv-magnetisch geregeltem Dichtspalt

Country Status (5)

Country Link
US (1) US4434987A (ja)
EP (1) EP0097800B1 (ja)
JP (1) JPS599371A (ja)
BR (1) BR8303386A (ja)
DE (1) DE3379342D1 (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691276A (en) * 1985-10-21 1987-09-01 Borg-Warner Industrial Products, Inc. Adaptive control system for mechanical seal assembly
US4643437A (en) * 1985-10-21 1987-02-17 Borg-Warner Industrial Products, Inc. Mechanical seal with automatic gap convergence control
DE3839843C2 (de) * 1988-11-25 1995-04-06 Mtu Muenchen Gmbh Wellendichtung für Turbomaschinen, insbesondere Gasturbinentriebwerke
US5064205A (en) * 1990-05-23 1991-11-12 General Electric Company Active magnetic seal
US5152536A (en) * 1991-04-16 1992-10-06 Theodor Bardas Fluid seal with a maintained gap of seal faces
US5137286A (en) * 1991-08-23 1992-08-11 General Electric Company Permanent magnet floating shaft seal
US5762342A (en) * 1996-05-03 1998-06-09 Durametallic Corporation Mechanical seal with controller for regulating face contact pressure
US5954342A (en) * 1997-04-25 1999-09-21 Mfs Technology Ltd Magnetic fluid seal apparatus for a rotary shaft
GB2336408B (en) * 1998-04-17 2002-07-24 Rolls Royce Plc A seal arrangement
GB0028408D0 (en) * 2000-11-22 2001-01-03 Rolls Royce Plc Seal apparatus
JP2008517235A (ja) * 2004-10-22 2008-05-22 ブルクハルト コンプレッション アーゲー ドライ・ラン・ピストン・ロッド・シール装置およびドライ・ラン・ピストン・ロッド・シール装置を有するピストン・ロッドを封止する方法
US7291287B2 (en) * 2005-05-25 2007-11-06 Ferrolabs, Inc. Method of making magnetic fluid
US7129609B1 (en) 2005-08-30 2006-10-31 Ferrolabs, Inc. Magneto-fluidic seal with wide working temperature range
GB2440744B (en) * 2006-08-09 2008-09-10 Rolls Royce Plc A blade clearance arrangement
CA2607700A1 (en) * 2006-11-03 2008-05-03 General Electric Company Mechanical sealing system and method for rotary machines
ATE507421T1 (de) * 2008-03-28 2011-05-15 Alstom Technology Ltd Blattdichtung für turbomaschine
US20100327534A1 (en) * 2009-06-26 2010-12-30 General Electric Company Magnetic brush seal system
NL2005586A (en) * 2009-12-02 2011-06-06 Asml Netherlands Bv Lithographic apparatus and sealing device for a lithographic apparatus.
JP6483125B2 (ja) * 2013-12-02 2019-03-13 ブルクハルト コンプレッション アーゲー シールアセンブリおよびその操作方法
US10465544B2 (en) * 2017-07-24 2019-11-05 United Technologies Corporation Eddy current damper for lift off seal
US10794493B2 (en) * 2017-09-18 2020-10-06 Hamilton Sunstrand Corporation Electromagnetic cartridge seal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025070A (en) * 1959-12-11 1962-03-13 John C Copes Split mechanical seals
DE2515316A1 (de) * 1975-04-08 1976-10-14 Borsig Gmbh Wellendichtung fuer turbomaschinen

Also Published As

Publication number Publication date
BR8303386A (pt) 1984-02-07
JPS599371A (ja) 1984-01-18
US4434987A (en) 1984-03-06
EP0097800A3 (en) 1987-09-30
JPH0243941B2 (ja) 1990-10-02
EP0097800A2 (de) 1984-01-11
DE3379342D1 (en) 1989-04-13

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